var isDHTML = 0;
var isID = 0;
var isAll = 0;
var isLayers = 0;

if (document.getElementById) {isID = 1; isDHTML = 1;}
else {
if (document.all) {isAll = 1; isDHTML = 1;}
else {
browserVersion = parseInt(navigator.appVersion);
if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {isLayers = 1; isDHTML = 1;}
}}

function findDOM(objectID,withStyle) {
	if (withStyle == 1) {
		if (isID) { return (document.getElementById(objectID).style) ; }
		else { 
			if (isAll) { return (document.all[objectID].style); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
	else {
		if (isID) { return (document.getElementById(objectID)) ; }
		else { 
			if (isAll) { return (document.all[objectID]); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
}

	var thisAd = 0;
	if (document.images)
	{	
	var adImag = new Array();
		adImag[0] = "images/pict1.jpg";
		adImag[1] = "images/pict2.jpg";
		adImag[2] = "images/pict3.jpg";
		adImag[3] = "images/pict4.jpg";	
	}

	function rotate() {
			thisAd++;
			if (thisAd == 4) 
			{
				thisAd = 0;
			}
			var dom = findDOM('pictures',0);
			dom.src=adImag[thisAd];
			setTimeout("rotate()", 2500);
	}